This could occur with extremely large planner estimates for the
size of a hashjoin's result.

Fix very rare crash in inet/cidr comparisons (Chris Mikkelson)

Fix PAM password processing to be more robust (Tom)

The previous code is known to fail with the combination of the
Linux pam_krb5 PAM module with Microsoft
Active Directory as the domain controller. It might have problems
elsewhere too, since it was making unjustified assumptions about
what arguments the PAM stack would pass to it.

Make the postmaster ignore any application_name parameter in connection request
packets, to improve compatibility with future libpq versions
(Tom)

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